Process for extinguishing fires



?atented an 22, mo

fum'rso STATES.

OTTO TBEICHEL, OB BERLIN, GERMANY raocnss ron nxrmeursnme rmms Iio"Drawing. Application filed October 31, 1927, Serial 1T0. 880,185, andin Germany November 15, 1988.

5 tetrachloride is used as extinguishing agent.

the

My invention relates to a process for extinguishing fires.

According to my improved process a crystallized mixture of carbonic acidand carbon It has already been proposed to use carbonic acid in the formof snow for extinguishing. fires. In the known process only a fractionof the carbonic acid is converted into snow, whereas, in my process onlyvery small quantities of carbomc acid are lost in the formation of themixed crystals of carbonic acid and carbon tetrachloride which startforming at 5 C. For mixing the carbon tetraplication of excessively lowtemperatures and to convey them in suitable manner to the place wherethey should perform their extinguish- V ing action.

If it is not desired to utilize the eflect of the heat developed by thesolution when the carbonic acid and carbon tetrachloride are mixedtogether to obtain a crystallized mixture, the crystallized mixture maybe obtained in a satisfactory amount by storingthe liquids together, forexample, in the proportiogfiifd 1 tol 1 and, vlvlhen a fire isfltlo beextingm e re easing't em into pa 0' 11 re- I ceptacles, such as, pipes,tunnels,'e tc. v:ithin which thecrystallme mixture will then be formed.'w

Various changes maybe made within the scope of my claims withoutdeparting from irit of my invention. f Ic imasmiinvention:' '3

1. The met od ofextinguishing fires-- which consists in dischargingliquid carbon;

dioxide and carbon tetrachloride nto a lower re'ssure medium whilemaintthem'ifi intimate contact whereby a cry 1 mixture is formed,'anddirecting said mixture onto the fire.

2. The method of extinguishing fires which consists in releasin liquidcarbonic acid and carbon tetrachloride, coming from separate sources, ata common point into the atmosphere whereby a crystalhne mixture isfiormed, and directing said mixture onto the 3. The process ofextinguishing fires which consists in storin in separate containersliquid carbonic aci and carbon tetrachloride, effectin a mixture of saidcarbonic acid and said car 11 tetiachloride by means of a mixing cockhaving two concentric tubes connected respectively with said containers,and directing said mixture onto the fire.

In testimony whereof I affix mg signature.

'OTTO TR 10 EL.

